package 面向对象中级.继承;

public class Circle {
    private double radius;
    double Pi;

    public Circle(double radius) {
        this.radius =1;
    }

    public Circle() {
    }

    public void setRadius(double radius){

    }

    public double getRadius() {
        return radius;
    }
    public double findArea(){
        double result=Pi*radius*radius;
        return  result;
    }
}
